Heart-Curve.cpp

#include <iostream>
#include <cmath>
#include <string>
#include <unistd.h>
using namespace std;

int main() {

    string s = "<srx>";
    for( float y = 1.3 ; y >= -1.1 ; y -= 0.06 ){
       
        int index = 0;
        for( float x = -1.2 ; x <= 1.2 ; x += 0.025 )
            if( pow((x*x+y*y-1.0),3) - x*x*y*y*y <= 0.0 ){
                usleep(800);     //Let the image appear gradually
                cout<<s[(index++)%s.size()];
            }
            else
                cout<<' ';
        cout<<endl;
    }
cout<<"                                          情人节快乐!!!"<<endl;

    return 0;
}